Help : Segmentation fault when using a 3rd library

[SGaist]

Since you are using MinGW, your should already have a debugger then just click on the other green arrow, then one with the little bug, you should get more information

[Tissues]

Application Output:
Debugging starts
can't find linker symbol for virtual table for 'QApplication' value

There are many warnings. Some read 'ignoring #pragma comment' while others 'unused parameter'. What is the problem?

[SGaist]

Did you download the MinGW version ? If so, it's been compiled with MinGW 4.6.2 which is not compatible with 4.8

[Tissues]

Oh, I am now using Qt creator 5.2.0 and MinGW4.8. How can I reduce MinGW to a 4.6.2 version?

[SGaist]

You would need to install it by hand and also recompile Qt with it

[SGaist]

However, the download page also mention that you can request a build, so you could try to ask them about a version using MinGW 4.8

[Tissues]

Thx for your reply! I have downloaded Mingw32 4.6.2, but I want to ask how to recompile Qt with it.

[SGaist]

Just follow the "documentation":http://qt-project.org/doc/qt-5/windows-building.html

However, I would recommend trying to ask a build for MinGW 4.8

[Tissues]

I've tried to follow the instruction, but it is complex for me. I just copied and pasted MinGW4.6.2 in the directory, and compiled the program. Now it stops at the very beginning and the Application Output window says
Debugging starts
(Internal error: pc 0x54f558 in read in psymtab, but not in symtab.)
(Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
(Internal error: pc 0x54f616 in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
(Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
(Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
(Internal error: pc 0x406a80 in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adc in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
(Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
(Internal error: pc 0x54f558 in read in psymtab, but not in symtab.)
(Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
(Internal error: pc 0x54f616 in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
(Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
(Internal error: pc 0x54f615 in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
(Internal error: pc 0x406a80 in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adc in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adb in read in psymtab, but not in symtab.)
(Internal error: pc 0x406adb in read in psymtab, but not in symtab.)

[SGaist]

Did you also compile Qt with that version of MinGW ?